Stellarap http://www.stellarcore.com/ This is a firmware for a stellaris launchpad based controller for a 3D printer.
License: The Stellarap code is licensed under the GNU GENERAL PUBLIC LICENSE, Version 3, 29 June 2007. The license is available here http://www.gnu.org/licenses/gpl-3.0.txt and is also provided in the accompanying LICENSE file. This License MUST be included in all distributed versions of this code. All of this software is provided AS-IS with no implied warranty or liability under sections 15, and 16 of the GPL V3. If your printer burns down your house, it's not my fault.
Disclaimer of Warranty. THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
Limitation of Liability. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
ARM Cortex-M4 toolchain such as: GCC Arm Embedded https://launchpad.net/gcc-arm-embedded CodeSourcery Lite GCC EABI for ARM http://www.mentor.com/embedded-software/sourcery-tools/sourcery-codebench/editions/lite
Stellarisware Software Package (since renamed to TivaWare):
This software library includes functions and libraries for many of the on-board peripherals used in the chip.
The library has also been compiled and optimized in the ROM that is available on the chip itself, meaning that library calls to TivaWare functions cost no program memory. It also includes some special initialization stuff that is needed for the particular ARM core in the chip. http://www.ti.com/tool/sw-tm4c
C Libraries I have used my own compiled version of Newlib to provide libc.a and libm.a which provides some standard C functions as well as math functions. It is likely that you will be able to find a pre-compiled version of newlib or even use the version that is included with the toolchain (above). http://sourceware.org/newlib http://eehusky.wordpress.com/2012/12/17/using-gcc-with-the-ti-stellaris-launchpad-newlib/
Recommended Software: OpenOCD compiled with support for the TI Link This is a great software that I use to debug with the Stellaris Launchpad. It allows you to use the built in TI Link that is on the development board with the GDB included in the GCC toolchain. Instructions for building/using the Stellaris Launchpad with OpenOCD are here: http://processors.wiki.ti.com/index.php/Stellaris_Launchpad_with_OpenOCD_and_Linux
Build Instructions: Set your path to include your compiler toolchain.
$make clean $make
Flash/Debug Instructions: Start OpenOCD with the stellaris connected through the development USB connector. $./openocd & $arm-none-eabi-gdb main.axf target extended-remote :3333 monitor reset halt load monitor reset init run
Acknowledgements: Great thanks to the folks in irc.freenode.net/#reprap for the help to understand 3D printing and for helping me to understand what the firmware should be doing. Special thanks to Kliment for his help explaining the Marlin firmware, which my firmware may bare a striking resemblance to.